Phones should be turned off or left at home anyways when protesting. Here are my 10 commandments for engaging in protests:
1: never bring your wallet/ID. If you need to buy things, bring cash
2: either shut off your phone or leave it with your wallet. Recording police violence can be useful, in that case get the aclu app, a burner phone with the app, or an action camera
3: never speak to police under any circumstance
4: you can beat the charge but you can’t beat the ride
5: bring water, it’s more useful than for just drinking
6: bring hats, sunglasses, etc to avoid being identified by the state if it gets violent
7: wear good running shoes
8: know your rights, both federal and local, and when to use them
9: take out any contact lenses in case police use tear gas
10: stay aware of your surroundings; listen to picket line enforcers/community organizers
These are all fine in the US, but in other countries not carrying proof of identity can get you into some trouble, as can refusing to talk to the police. Know your local laws.
what does 4 mean?
You can always be found not guilty in court, but if the police want to take you in, it’s better to just go willingly